We are setting up Portal for ArcGIS but need clarification on groups. Followed the Model Organization for Water Utilities, created all the groups as shown but we are unable to go further. How do you link the items, users & roles to these groups which were created? Can groups be nested? Could anyone point me to a webinar, video, documentation which will be helpful? I've been going through the User Conference Videos and some others but what is there, does not explain or demonstrate what I'm looking for. Please help, I'm getting desperate.